This is a full blown Auction Manager contrib that easily allows you to upload your auction listings from ebay
and manage your ebay auctions.
It is recomended to install the Purchase Without Account contrib to use with this one.
You are not required to but it is recomended. It can be found here:
Also, this contrib REQUIRES cURL. You must have the cURL module for php installed.
You can check by looking at the Server Info from the admin. You will see it listed there.